Refrigerating apparatus



Jan. 28, 1930. J. G. KING REFRIGERATING APPARATUS Original Filed Nv. 24,1925 2 sheds-sheet IIIIIIIIIIIIIIIIIIIIIIIIIINIIWMNMWIIIIIIHI Jan. 2s,1930.`

J. G. KING REFRIGERATING 'APPARATUS Orlgnal Filed Nov. 24, 1925 2Sheets-Sheet 2 v w Grundy/0 Patented Jan. 1930 i UNITED STATES PATENTOFFICE I G. KING, Ol' DAYTON, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TOIRIGIZD- AIRE CORPORATION, A CORPORATION OF IDEI'JAWASRJILyREFRIGERATING APPARATUS Application led November 24, 1925, Serial No.71,170. Renewed September 22, 1927.

This invention relates to refrigerating apparatus and particularly tocooling units or evaporators.

One ofthe objects of the present invention 5 is to improve the generalconstruction of the evaporator 'and to facilitate the manufacturethereof. A

More speccally it is one of the objects of the invention to provide aform of evaporator 1o which may be constructed substantially entirely ofsheet metal and thus reduce the cost of manufacture.

One manner of carrying out the above object is to wrap a sheet ofmaterial to provide a hollow chamber. for receiving articles to befrozen or congealed and spacing the turns of the material to provide achamber for refrigerant.

. Other and further objects of the present invention will be apparentfrom the following description, reference being had to the accompanyingdrawings, wherein a preferred form of embodiment of the presentinvention is clearly shown.

In the drawings:

Fig. 1 is a cross sectional view of the improved evaporator showingcontainers for water or the like in elevation.

Fig. 2 is a front view in elevation.

Fig. 3 is an elevational view of a connector ring, and

Fig. i is a sectional view taken on line 4 4 of Fig. 2 and showing icetrays in side elevation. e

Referring to the drawings, 20 is a header for receiving refrigerant. Theheader 20 is provided with an end plate 21 to which is connected acoupling 22 which is adapted to be connected with a condenser of a refrirating a certain amount of liquid rerigerantis nor-A mally maintainedwithin the header 20. Gasiied refrigerant passes from the header 20 ithrough a tube 26 which is connected through the plate 21 with couphn'g23.

apparatus, and a coupling 23 connectible with Adjacent the header 20,and connected to it,

preferably by a number of conduits or connections 27 in parallel circuitrelation, is a refrigerant chamber 28 forming a chilling compartment orenclosure for ice making receptacles 33. This chamber is preferablyformed vof thin sheet metal in the following manner. A sheet 29 isattached to the conduits 27 at a point roughly one fourth of its lengthfrom one end, and is then formed as by winding or rolling into a spiralhaving slightly more than two convolutlons. Each end edge of the sheetis sealed to the side of the sheet approximately at its center so as tospace the convolutions from each other and close the space thus formed.This may be accomplished by sealing each end to a spacing bar 30 andsealing the spacing bar to the sheet near its middle. This arrangementprovides a pair of hollow walls extending in opposite directions fromthe connections 27 and forming a substantially annular refrigerantchamber. The chamber may be closed at each end in any suitable manner,as by a spiral member 31 fitted into the spiral space between theconvolutions and sealed to the sheet 29.

As shown, the chamber 28 is in close-coupled relationship with theheader 20, being connected therewith by the short duct connections orcouplings 27 at a pluralityof points along the length thereof. Chamber28 is located below the header 20 and being in free communicationtherewith it is normally filled with liquid refrigerant and as a resultof this the wall forming the chilling compartment is substantially atall times exposedv to the temperature of the liquid refrigerant,

which, becausey of the liquid'to metaLcontacttends to establishsubstantially uniformly cold temperatures for-the walls of the chillingcompartment.

Brackets 32 are suitably secured'to the inner turn of sheet metal 29 andsupport containers 33 for water to be frozen vor for articles to becongealed. v

The evaporator as herein described is simple in construction and can bemanufactured.' Y at a relatively low cost. -Itprovides a rela- Y tivelycold portion for receiving ice 'trays or the like and also provides alarge outer surface for cooling air.

While the for'm of embodiment of the present invention as hereindisclosed, constitutes a preferred form, it is to be understood thatother forms might be adopted all coming within the scope of the claimswhich follow.

What is claimed is as follows:

1. An evaporator for refrigerating apparatus comprising a single sheetof metal wound into a spiral coil, the end edges of the sheet beingjoined to the sides of the sheet to form a substantially annularchamber, the ends of the chamber being closed.

2. An evaporator for refrigerating apparatus comprising a single sheetof metal wound into a spiral coil, and a pair of spacing means eachsecured to one end edge of the sheet and to the side of the sheet toform a substantially annular chamber, the ends of the chamber beingclosed.

3. An eva orator for refrigerating apparatus comprising a single sheetof metal wound into a spiral coil, a pair of spacing means each securedto one end edge of the sheet and to the side of the sheet to form asubstantially annular chamber and a pair of spiral members eachinterposed between adjacent ends of the spacing means and joined to theside edges of the sheet to close the chamber.

4. An evaporatorfor refrigerating apparatus comprising a single sheet ofmetal wound into a spiral coil, and spiral spacing members interposedbetween the convolutions of the sheet, said spacing members beingfastened to the sheet to enclose a substantially annular chamber.

5. Refrigerating apparatus comprising, in combination, a cooling devicecomprising a header forming a reservoir for liquid refrigerant, one ormore hollow7 sheet metal walls connected to the header, the walls beingarranged to form a plurality of refrigerant circulating pathsin parallelcircuit relation, port-means for admitting liquid refrigerant to saidheader, a second port-means for withdrawing refrigerant vapor therefrom,and means for maintaining in the cooling unit a level of liquidrefrigerant at all times suicient to maintain liquid refrigerant incontact with said sheet metal walls up tothe height of the headerwhereby to establish substantially uniform wall temperatures oppositethe liquid refrigerant.

6. Refrigerating apparatus comprising, in combination, a cooling devicecomprising a header forming a reservoir for liquid refrigerant, one ormore hollow sheet metal walls connected to the header, the walls beingarranged to form a plurality of refrigerant circulating paths inparallel circuit relation, said wall or walls forming an enclosure foran ice-making receptacle positioned below the header, port-means foradmitting liquid refrigerant to said header, a second portmeans forwithdrawing refrigerant vapor therefrom, and means for maintaining inthe cooling unit a quantity of refrigerant suicient to keepsubstantially all of said wall or walls facing said enclosure underliquid and substantially uniformly exposed to the liquid temperaturethereof.

7. Refrigerant liquid storage, control and evaporating means for arefrigerating apparatus, comprising in combination a fabricated unitarystructure comprising a header providing a chamber for liquid and gaseousrefrigerant, and a liquid evaporating chamber positioned below theheader and comprising a pair of spaced shells, one of said shells beingsecured in close coupled relationship to the header and the spacebetween the shells being closed at its ends and in communication withthe liquid in the header, port-means for admitting liquid refrigerant tosaid header and for withdrawing refrigerant vapor therefrom, and meansfor maintaining in the evaporating means a level of liquid refrigerantsufficient to at all times maintaining said evaporating chamber!submerged in liquid refrigerant whereby to'expose the Walls thereofsubstantially uniformly to the temperature of the liquid refrigerant.

8. Refrigerant liquid storage, control and evaporating means for arefrigerating apparatus comprising in combination, a fabricated unitarystructure comprising a header providing a chamber for liquid and gaseousrefrigerant, and a liquid evaporating chamber positioned below theheader and comprisa pair of shells spaced apart to form a insustantially annular passage for liquid refrigerant and a coolingchamber within the shells, one of the shells being secured inclosecoupled relationship to the header and said passage being in opencommunication with the li uid in the header, the Walls of said cooling camber submerged in liquid refrigerant and substantially uniformlyexposed to the liquid temperature thereof.

9. A refrigerating system, refrigerant liquid storage, control andevaporating means comprising, in combination, a fabricated unitarystructure having a header providing a. chamber for liquid and gaseousrefrigerant, and a liquid evaporating chamber connected with the headerand comprising sheet metal walls rolled to provide inner and outer wallsspaced to provide therebetween a liquid evaporating chamber, said innerand outer sheet metal walls being joined at their edges and soconstructed and arranged so to form a refrigerating compartmentextending through the structure and open at both ends, port means foradmitting liquid refrigerant to the interior of said structure and forwithdrawing vaporized refrigerant therefrom, and means for socontrolling the level of liquid refrigerant as to maintain substantiallythe entire said inner sheet metal wall in contact with refrigerant andexposed to liquid refrigerant temperature.

l0. A refrigerating system, refrigerant liquid storage, control andevaporating means, comprising, in combination, a fabricated unitarystructure having a header providing a chamber for liquid and gaseousrefrigerant and evaporating means positioned below sai header andcomprising sheet metal rolled to provide spaced-apart inner and outerwalls joined together at both edges whereb to pro- Vide therebetween ashallow refyiigerant chamber forming an enclosure for a chillingcompartment with said inner wall facing said compartment, meansestablishing communication between said header and the chamber of saidevaporating means at a plurality of points along the length of thelatter, and means for at all times maintainin a level of liquidrefrigerant sufcient to su stantially submerge said inner wall facingthe said chilling compartment..

11. A refrigerating system, refrigerant liquid storage, control andevaporating means, comprising, in combination, a fabricated unitarystructure havin a horizontal header providing a chamber or liquid andgaseous refrigerant, and evaporating means positioned below and close tosaid header and 3G comprising sheet metal rolled to provide spaced-apartinner and outer walls joined together at both edges whereby to providetherebetween a shallow refrigerant chamber bounding with its inner walla chilling compartment having its longitudinal axis horizontallydisposed and parallel with the axis of said header, means establishingcommunication between the chambers of said header and said evaporatingmeans along the length. thereof, port means for admitting refrigerant toand for withdrawing refrigerant from said chambers, and means formaintaining a level of liquid refrigerant in said chambers at all timessufficient to substantially submerge said inner walls of the chillincompartment whereby the wall of said c ing compartment is continuouslymaintained at liquid refrigerant temperatures.

In testimony whereof I hereto aix my sigso mm" Jnssn e KING

